/Engine/Source/Runtime/OpenGLDrv/Public/OpenGLDrv.h
Returns the status of an ongoing or completed texture reallocation: TexRealloc_Succeeded - The texture is ok, reallocation is not in progress. TexRealloc_Failed - The texture is bad, reallocation is not in progress. TexRealloc_InProgress - The texture is currently being reallocated async.
virtual ETextureReallocationStatus RHIFinalizeAsyncReallocateTexture2D ( FRHITexture2D * Texture2D, bool bBlockUntilCompleted )